1001211102221 has 8 divisors (see below), whose sum is σ = 1118870057088. Its totient is φ = 887992108000.

The previous prime is 1001211102197. The next prime is 1001211102239. The reversal of 1001211102221 is 1222011121001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001211102221 - 2²² = 1001206907917 is a prime.

It is a super-2 number, since 2×1001211102221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001211102196 and 1001211102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001211102271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109989685 + ... + 1109990586.

It is an arithmetic number, because the mean of its divisors is an integer number (139858757136).

Almost surely, 2^{1001211102221} is an apocalyptic number.

1001211102221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001211102221 is a deficient number, since it is larger than the sum of its proper divisors (117658954867).

1001211102221 is a wasteful number, since it uses less digits than its factorization.

1001211102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219980323.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1001211102221 its reverse (1222011121001), we get a palindrome (2223222223222).

The spelling of 1001211102221 in words is "one trillion, one billion, two hundred eleven million, one hundred two thousand, two hundred twenty-one".